Urinalysis Ch 4 MC
The refractive index compares: A. Light velocity in solutions with light velocity in solids B. Light velocity in air with light velocity in solutions C. Light scattering by air with light scattering by solutions D. Light scattering by particles in solutions
light velocity in air with light velocity in solutions
An antidiuretic hormone deficiency is associated with a: A. Specific gravity close to 1.025 B. Low specific gravity C. High specific gravity D. Variable specific gravity
low specific gravity
A specimen with a specific gravity of 1.040 and a 1+ glucose and a negative reagent strip protein is most likely caused by: A. Glucose B. Protein C. Diabetes insipidus D. Radiographic contrast media
radiographic contrast media
. Results of a specific gravity reading obtained by refractometer in the urology clinic do not agree with the readings obtained by the laboratory's automated reagent strip reader. The laboratory should: A. Recalibrate the reagent strip reader B. Check the calibration of the refractometer in the clinic C. Request the clinic to collect new specimens D. Report the results from the reagent strip reader
report the results from the reagent strip reader
Significant/Insignificant: WBCs
significant
Significant/Insignificant: bacteria
significant
Significant/Insignificant: lipids
significant
Which of the following statements concerning measurement of specific gravity by refractometer is not true? A. The refractometer must be calibrated after every specimen. B. This method is not affected by the temperature of the specimen. C. This method measures dissolved particles in the urine. D. The method requires less than 1 mL of urine
the refractometer must be calibrated after every specimen
TRUE/FALSE a urine specimen that remains at room tepm for several hours may develop a darker yellow color
true
TRUE/FALSE collection of a midtream clean catch specimen can affect the clarity of a urine specimen
true
TRUE/FALSE the density of a urine specimen can affect the frequency a sound wave
true
TRUE/FALSE urine SG can be measured by both physical and chemical methods
true
Acceptable/Unacceptable: A cloudy, brown-black urine with a positive test for blood and a strong odor of ammonia
unacceptable
Acceptable/Unacceptable: a pale yellow urne with a noticeable odor of bleach
unacceptable
The primary pigment responsible for normal urine color is: A. Uroerythrin B. Urochrome C. Hemoglobin D. Bilirubin
urochrome
The pigment responsible for a pink precipitate in refrigerated urine is: A. Uroerythrin B. Urochrome C. Bilirubin D. Biliverdin
uroerythrin
Which of the following specific gravity readings correlates with a pale yellow urine? A. 1.005 B. 1.015 C. 1.025 D. 1.035
1.005
A urine specific gravity measured by refractometer is 1.028, and the urine temperature is 29oC. The specific gravity should be reported as: A. 1.020 B. 1.025 C. 1.028 D. 1.031
1.028
A urine specimen is diluted 1:10, and the specific gravity reads 1.006. The actual specific gravity is: A. 1.006 B. 1.016 C. 1.060 D. 10.006
1.060
If a refractometer reads 1.003 with distilled water, the technologist should: A. Subtract 0.003 from the specimen results B. Add 0.003 to the specimen results C. Use a urinometer to measure the specific gravity D. Calibrate the refractometer by adjusting the set screw
Calibrate the refractometer by adjusting the set screw
A patient that has been diagnosed with diabetes mellitus will produce urine with: A. Increased volume and decreased specific gravity B. Decreased volume and decreased specific gravity C. Increased volume and increased specific gravity D. Decreased volume and increased specific gravity
Increased volume and increased specific gravity
Specimens that contain intact red blood cells can be visually distinguished from specimens that contain hemoglobin because: A. Hemoglobin produces a brighter red color B. Hemoglobin produces a cloudy pink specimen C.Intact red blood cells produce a cloudy specimen D. Intact red blood cells are rapidly converted to hemoglobin
Intact red blood cells produce a cloudy specimen
Acceptable/Unacceptable: A clear, pale yellow specimen with a specific gravity of 1.030
acceptable
Acceptable/Unacceptable: A hazy, yellow urine that produces a noticeable amount of white foam
acceptable
Acceptable/Unacceptable: a port wine colored specimen with a neg test for blood
acceptable
Urine from a patient diagnosed with hepatitis will appear: A. Pale yellow B. Amber C. Red D. Brown
amber
Bacterial decomposition of urea produces urine that has an odor resembling: A. Aromatic amines B. Asparagus C. Ammonia D. Bleach
ammonia
The addition of dilute acetic acid to a cloudy urine specimen will dissolve: A. Amorphous urates B. White blood cells C. Yeast D. Amorphous phosphate
amorphous phosphate
The presence of a white precipitate in freshly voided urine can be caused by: A. Amorphous urates in alkaline urine B. Amorphous urates in acid urine C. Amorphous phosphates in alkaline urine D. Amorphous phosphates in acid urine
amorphous phosphates in alkaline urine
Slightly warming a turbid urine specimen may dissolve: A. Talcum powder B. Amorphous urates C. Amorphous phosphate D. Radiographic contrast media
amorphous urates
A dark yellow urine producing yellow foam may contain: A. Hemoglobin B. Protein C. Red blood cells D. Bilirubin
bilirubin
Which of the following urine colors and causes match? A. Red—carotene B. Dark yellow—porphyrins C. Black—melanin D. Green—pyridium
black--melanin
The color of a urine specimen containing blood can be attributed to all of the following except the: A. Amount of blood B. Blood type of patient C. pH of the urine D. Length of contact
blood type of patient
Specific gravity is a measure of: A. Particle numbers B. Molecular weight C. Molarity D. Density
density
The specific gravity of urine is directly proportional to its: A. Turbidity B. Dissolved solids C. Salt content D. Glucose content
dissolved solids
The calibration of the refractometer can be quality-controlled using all of the following except: A. Distilled water B. 5% NaCl C. 9% sucrose D. Commercial controls
distilled water
TRUE/FALSE a clear yellow urine will no contain any pathologically significant constituents
false
TRUE/FALSE a pale yellow urine is a primary indication of impaired renal function
false
TRUE/FALSE a supervisor should be concerned if a SG reading of 1.008 is reported on a turbid urine specimen
false
TRUE/FALSE clear red urine and red plasma are associated with myoglobinuria
false
TRUE/FALSE urine SG is equally influenced by the presence of glucose and sodium
false
A urine specimen that turns black after standing may contain: A. Porphobilinogen B. Homogentisic acid C. Carboxyhemoglobin D. Myoglobin
homogentisic acid
Significant/Insignificant: amorphous urates
insignificant
Significant/Insignificant: radiographic contrast media
insignificant
Significant/Insignificant: squamous epithelial cells
insignificant
17. A urine with the same specific gravity as the ultrafiltrate is called: A. Isosthenuric B. Hyposthenuric C. Ultrasthenuric D. Hypersthenuric
isosthenuric